--- title: "DAS Solar DAS-LOJP-420 420W Solar Panel - Specs & Review | ComparePV" description: "DAS Solar DAS-LOJP-420 420W solar panel. Specs: 20.30% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/das-solar-das-lojp-420" updated: 2026-09-11 --- # DAS Solar DAS-LOJP-420 Light for its output, needs the roof space 954 panels in the segment PERC 400-450 W ## Identity - **Manufacturer:** DAS Solar - **Model:** DAS-LOJP-420 - **Series:** DAS-LOJP - **Rated power:** 420 W - **Cell technology:** PERC ## How it compares Compared against segment PERC 400-450 W (954 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 420 W | 410 W | Typical | | | Module efficiency | 20.30% | 20.60% | Weak - bottom 23% | 11,769 | | Power density | 181.6 | 206.2 | Weak - bottom 1% | 13,172 | | Temperature coefficient | -0.340 | -0.350 | Strong - top 24% | 8,778 | | Weight (kg) | 9.9 kg | 22.0 kg | Strong - top 2% | | | Performance warranty | 25 yrs | 25 yrs | Typical | 9,798 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 20.30% | 20.60% | Weak - bottom 23% | 11,769 | | Power density | 181.6 | 206.2 | Weak - bottom 1% | 13,172 | | Temperature coefficient | -0.340 | -0.350 | Strong - top 24% | 8,778 | | Weight per kWp | 23.6 | 53.0 | Strong - top 2% | 88 | | Performance warranty | 25 yrs | 25 yrs | Typical | 9,798 | ### Strengths - **23.6 kg per kWp** - Top 2% of the PERC 400-450 W segment, against a median of 53.0. Ranked 88th in the whole database. - **-0.340 %/°C temperature coefficient** - Top 24% of the PERC 400-450 W segment, against a median of -0.350. ### Watch out for - **181.6 watts per square metre** - Bottom 1% of the PERC 400-450 W segment, against a median of 206.2. Ranked 13,172nd in the whole database. - **20.30% module efficiency** - Bottom 23% of the PERC 400-450 W segment, against a median of 20.60%. - **Best for:** Commercial and hot-climate. - **Not ideal for:** Roofs where every square metre has to count and tight roof space. ## Specification ### Electrical - **Rated power (Pmax):** 420 W - **Efficiency:** 20.30 % - **Voltage at Pmax (Vmp):** 41.91 V - **Current at Pmax (Imp):** 10.03 A - **Open-circuit voltage (Voc):** 50.45 V - **Short-circuit current (Isc):** 10.58 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.340 %/degC - **Temperature coefficient of Voc:** -0.260 %/degC - **Temperature coefficient of Isc:** 0.048 %/degC - **NOCT:** 43 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** PERC ### Physical - **Length:** 1985 mm - **Width:** 1165 mm - **Thickness:** 4 mm - **Weight:** 9.9 kg - **Area:** 2.31 m2 - **Power density:** 181.6 Wp/m2 ### Warranty and degradation - **Product warranty:** 10 years - **Performance warranty:** 25 years - **Output guaranteed at end of warranty:** 85.5 % - **First-year degradation:** 2.50 % - **Annual degradation:** 0.50 % - **Output after 30 years:** 349 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 11769 of 14005 | | Power density | 13172 of 14005 | | Temperature coefficient | 8778 of 14005 | | Weight | 88 of 14005 | | Warranty | 9798 of 14005 | ## Pros - **Module weight ~9.9 kg — 60% lighter than conventional modules** - The DAS-LOJP weighs just 9.9 kg at 410–420 Wp, whereas conventional glass-aluminum modules of comparable power output typically weigh 21–23 kg. At only 4 mm thick, this is a decisive advantage for roofs with limited load-bearing capacity — such as corrugated metal or trapezoidal-profile roofing — and for BIPV applications where a standard module is structurally unacceptable. - **Frameless composite construction — no glass** - Eliminating glass and the aluminum frame removes the risk of breakage during transport and operation, reduces corrosion in aggressive environments (coastal, industrial), and lowers snow load due to the module's low mass. The manufacturer claims zero risk of microcracks owing to the flexible composite encapsulation. - **Installation flexibility — 880 mm bending radius** - The module tolerates bending down to an 880 mm radius, enabling integration with curved building surfaces (BIPV) and irregular rooflines. None of the peer comparables (GCL M10/54H, Phono Solar TWINPLUS, Solarspace SS8-54HSB) offer this flexibility — all are conventional rigid modules. - **Confirmed BNEF Tier-1 status** - DAS Solar earned its fourth consecutive quarterly listing on the BNEF Tier-1 module manufacturer index in 2025, confirming bankability — the ability to secure non-recourse project financing. Founded in 2018, the company achieved this status exceptionally quickly by industry standards. ## Cons - **Efficiency below all peer comparables** - The maximum module efficiency of 20.3% is lower than every comparable model in the peer group: GCL M10/54H reaches 21.5%, Phono Solar TWINPLUS 20.98%, and Solarspace SS8-54HSB 21.51%. The ~1.2–1.3 percentage-point gap relative to the peer median translates to approximately 6% lower power density for the same roof area — a meaningful penalty on space-constrained installations. - **10-year product warranty — below the 2026 market standard** - The industry benchmark for premium modules in 2026 is a 25-year workmanship (product) warranty. The DAS-LOJP covers only 10 years, leaving the module without factory coverage during years 10–25 of operation. Leading Tier-1 manufacturers — including Jinko, LONGi, and REC — routinely offer 12–25 years on this warranty layer. - **PERC cell technology, not N-type TOPCon** - The series is built on P-type PERC cells, which are susceptible to light-induced degradation (LID) and carry a less favorable temperature coefficient (typically -0.35%/°C) compared to N-type TOPCon cells (~-0.29%/°C). Peer comparables GCL M10/54H and Solarspace SS8-54HSB achieve their higher efficiencies precisely because of their N-type architecture. PERC is a mature technology, but it is no longer the leading cell technology in this power class for 2023–2026. - **Non-standard format — limited installer base in Poland** - Frameless composite-substrate modules require dedicated mounting systems that are incompatible with the standard clamps and rails in widespread use across Poland. The majority of local installation contractors have no experience with this format, which may extend installation time, complicate servicing, and create difficulties in obtaining insurance coverage for the system. ## About this series The DAS-LOJP series is a modern solution based on **N-type TOPCon technology**, which redefines efficiency standards in challenging lighting conditions. Thanks to the use of N-type cells, these modules completely eliminate the problem of light-induced degradation (LID), which directly translates to **higher yield stability** throughout the entire, multi-year life cycle of the installation. The use of an advanced **bifacial (double-sided)** design allows for the efficient harvesting of clean energy also from reflected radiation, which is crucial for mounting on bright surfaces or ground-based structures. These models stand out with an exceptionally favorable, low temperature coefficient, ensuring they work effectively even during intense summer heat when standard panels lose their rated power. This solution is primarily dedicated to demanding commercial investors and large-scale photovoltaic farms, where maximizing power density and the **lowest Levelized Cost of Energy (LCOE)** are key. DAS-LOJP distinguishes itself from market competitors by using SMBB technology, which significantly shortens the electron flow path and increases resistance to micro-cracks. By choosing this series, every user invests in **maximum mechanical durability** and absolute certainty of stable energy generation regardless of the dynamically changing atmospheric conditions in the Polish climate. ## Notable figures - At 20.3% efficiency, this panel is on par with typical \*\*PERC 400-450W\*\* modules - 181.6 W/m² power density is 24.6 W/m² below \*\*PERC 400-450W\*\* median (206.2 W/m²) - requires larger installation area - Temperature coefficient of -0.34%/°C matches the \*\*PERC 400-450W\*\* median - 9.9 kg weight - 12.1 kg lighter than \*\*PERC 400-450W\*\* median (22.0 kg), reducing installation effort - In the top 84% for efficiency among all PERC panels ## Questions ### What sets the DAS Solar DAS-LOJP series apart from standard photovoltaic panels? The DAS-LOJP series is engineered with extreme lightweight design as a core priority — modules weigh up to 60% less than conventional panels of equivalent power output, while delivering a maximum power of up to 420 Wp and an efficiency of approximately 20.3%. The use of flexible encapsulant materials and proprietary composite technologies virtually eliminates the risk of microcracks. This makes the series an ideal solution for investors who prioritize module durability and low structural loading. ### What warranty is provided for the DAS Solar DAS-LOJP panels? The manufacturer offers a 10-year product warranty covering material and workmanship defects, along with a 25-year linear power output warranty. In the first year, the allowable power degradation is 2.5%, followed by a maximum of 0.5% per year in subsequent years. DAS Solar is a Tier 1 manufacturer, reflecting independently verified financial and technological reliability. ### Are DAS-LOJP panels suitable for roofs with limited load-bearing capacity or aging roof structures? Yes, this is one of the primary use cases for this series. DAS-LOJP modules weigh approximately 9.9 kg, making them one of the lightest solutions available in the 420 Wp class. On roofs with reduced load-bearing capacity, concrete slabs, or garage structures where every kilogram matters, this series offers a genuine advantage over standard modules that typically weigh 21–23 kg. ### How do DAS Solar DAS-LOJP panels perform under overcast conditions and low-irradiance environments? The DAS-LOJP series is optimized for low-irradiance operation. As a result, the modules generate energy more effectively during morning and evening hours and on cloudy days — conditions that are typical of the Polish climate. PERC technology increases light absorption in the near-infrared spectrum, improving annual energy yield compared to conventional mono cells without a PERC back-surface passivation layer. ### Is the DAS-LOJP series monofacial or bifacial? DAS-LOJP modules are monofacial — they do not incorporate bifacial technology. Energy is harvested exclusively from the front surface of the panel. This simplifies the design of rooftop installations where reflected irradiance from the underlying surface would not reach the rear of the module anyway, and the absence of a rear glass sheet further reduces the overall structural weight. ### Can the DAS Solar DAS-LOJP 420W be used in mobile applications such as on a camper trailer or a boat? Yes, the lightweight construction and compact dimensions of approximately 1985 × 1165 × 4 mm — with a thickness of just 4 mm — make the DAS-LOJP one of the rare 420 Wp-class modules genuinely suited for mobile and specialized applications where weight and mounting flexibility are critical factors. That said, it is recommended to consult with a qualified installer to select an appropriate mounting structure for the specific application. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/Datasheet-DAS-LOJP-xxx410-420-b0b2f7188482.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Just Solar JST-EDMH-(445-465)W-TD (465W class)](https://comparepv.com/panel/just-solar-jst-edmh-445-465-w-td-465w-class) | 465 W | Heavier, +3.5 pp, +5 yr warranty | | [Luxor Solar LX-465M/182R-96+ GG](https://comparepv.com/panel/luxor-lx-465m-182r-96-gg) | 465 W | Cooler, heavier, +3.5 pp | | [Maxeon SPR-MAX7-470](https://comparepv.com/panel/maxeon-spr-max7-470) | 470 W | Heavier, +3.4 pp, +15 yr warranty | | [AIKO AIKO-A470-MAH54Mb](https://comparepv.com/panel/aiko-aiko-a470-mah54mb) | 470 W | Cooler, heavier, +3.3 pp | | [AIKO AIKO-A460-MAH54Mb](https://comparepv.com/panel/aiko-shenzhen-aiko-digital-energy-technology-co-ltd-aiko-a460-mah54mb-1) | 460 W | Cooler, heavier, +3.3 pp | | [TCL Zhonghuan HSM-BD54-LA470](https://comparepv.com/panel/tcl-zhonghuan-hsm-bd54-la470) | 470 W | Cooler, heavier, +3.3 pp | | [DAS Solar DAS-LOJP-410](https://comparepv.com/panel/das-solar-das-lojp-410) | 410 W | -10 W, -0.5 pp | | [DAS Solar DAS-LOJP-415](https://comparepv.com/panel/das-solar-das-lojp-415) | 415 W | -0.3 pp | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | +140 W, 15 kg heavier, +4.5 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | +135 W, 15 kg heavier, +4.3 pp | | [Longi Solar LR7-60HVHL-550M](https://comparepv.com/panel/longi-lr7-60hvhl-550m) | 550 W | +130 W, cooler, +4.1 pp | | [JA Solar JAT60S40-540/LR](https://comparepv.com/panel/ja-solar-jat60s40-540-lr) | 540 W | +120 W, heavier, +4.1 pp | | [Gokin GK-5-60HG-540M](https://comparepv.com/panel/gokin-gk-5-60hg-540m) | 540 W | +120 W, heavier, +4.1 pp | | [Jinko Solar JKM545-54QL6-DV-F1-EU](https://comparepv.com/panel/jinko-solar-jkm545-54ql6-dv-f1-eu) | 545 W | +125 W, 18 kg heavier, +4.0 pp | | [Longi Solar LR7-60HVH-545M](https://comparepv.com/panel/longi-lr7-60hvh-545m) | 545 W | +125 W, 15 kg heavier, +3.9 pp | --- Source: https://comparepv.com/panel/das-solar-das-lojp-420 Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.